Peter Gojowczyk of Germany in action against Ryan Harrison of the USA during their first round match at the Rolex Paris Masters tennis tournament in Paris, France, 30 October 2017. EPA-EFE/CHRISTOPHE PETIT TESSON

Rafael Nadal from Spain reacts during a press conference at the Rolex Paris Masters tennis tournament in Paris, France, 30 October 2017. EPA-EFE/CHRISTOPHE PETIT TESSON

Yuichi Sugita of Japan returns the ball to Filip Krajinovic of Serbia during their first round match at the Rolex Paris Masters tennis tournament in Paris, France, 30 October 2017. EPA-EFE/CHRISTOPHE PETIT TESSON

Mischa Zverev of Germany in action against Hyeon Chung of Korea during their first round match at the Rolex Paris Masters tennis tournament in Paris, France, 30 October 2017. EPA-EFE/CHRISTOPHE PETIT TESSON

Robin Haase of the Netherlands in action against Steve Johnson of the USA during their first round match at the Rolex Paris Masters tennis tournament in Paris, France, 30 October 2017. EPA-EFE/CHRISTOPHE PETIT TESSON

Steve Johnson of the USA in action against Robin Haase of the Netherlands during their first round match at the Rolex Paris Masters tennis tournament in Paris, France, 30 October 2017. EPA-EFE/CHRISTOPHE PETIT TESSON